Complex Numbers Question, Please Help (1 Viewer)

[lachy95]

Find alpha where alpha is a real number.

I made it a single fraction, realized the denominator, found Re and Im parts, then equated them to solve for alpha - but the solution always contained an i. The correct answer is alpha = -5.

Please help

 

[D94]

The Imaginary "part" of say 6 + 4i is 4, not 4i, which I believe is the mistake you're making.

Also, if you realize the denominator of each term first, it will return the same denominator for each term. So I found this method easier than to make one large fraction, because if you make it into a large fraction first, you will need to realize a very large complex denominator.

 

[D94]